### Dialogflow Card Response Implementation (Node.js)

Source: https://wiki.aisensy.com/en/articles/11489891-how-to-setup-fulfillment-response-in-dialogflow

This code example shows how to send a card response from Dialogflow fulfillment. It utilizes the 'dialogflow-fulfillment' library and allows for customization of title, image URL, and text content for the card. The image URL requires a specific format including the media type.

```javascript
const { WebhookClient, Card, Payload } = require('dialogflow-fulfillment');

const agent = new WebhookClient({request: req, response: res}); let intentMap = new Map();

intentMap.set(agent.intent, ()=>{
 agent.add(new Card({
 title: "Card Title",
 imageUrl: 'IMAGE;;' + "URL of media",
 text: "Card Text",
 buttonText: '',
 buttonUrl: ''
 }));
})
agent.handleRequest(intentMap)
```

--------------------------------

### Dialogflow Text Response Implementation (Node.js)

Source: https://wiki.aisensy.com/en/articles/11489891-how-to-setup-fulfillment-response-in-dialogflow

This snippet demonstrates how to set up a basic text response using Dialogflow's fulfillment service. It requires the 'dialogflow-fulfillment' library and is designed to be integrated into a backend system handling webhook requests from Dialogflow.

```javascript
const { WebhookClient } = require('dialogflow-fulfillment');
const agent = new WebhookClient({request: req, response: res});
let intentMap = new Map();

intentMap.set(agent.intent, ()=>{
 agent.add("Hi, This is Fulfillment Service responding");
})
agent.handleRequest(intentMap)
```

--------------------------------

### Dialogflow Carousel Response Implementation (Node.js)

Source: https://wiki.aisensy.com/en/articles/11489891-how-to-setup-fulfillment-response-in-dialogflow

This implementation shows how to send a carousel response using a custom payload in Dialogflow fulfillment. It's useful for displaying multiple items, such as products, with media and descriptions. The carousel structure is defined within a 'payload' object.

```javascript
const { WebhookClient, Card, Payload } = require('dialogflow-fulfillment');

const agent = new WebhookClient({request: req, response: res});
let intentMap = new Map();

const payload = {
 type: "carousel",
 items: [
 {
 title: "Title of card",
 body: "Card text",
 mediaType: "IMAGE",
 mediaUri: "Media URL"
 }
 ]
}

intentMap.set(agent.intent, ()=>{
 agent.add(new
Payload(agent.UNSPECIFIED, payload,
{rawPayload: true, sendAsMessage:
true}));
})
agent.handleRequest(intentMap)
```